<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var channel = new MessageChannel();
    var port1 = channel.port1;
    var port2 = channel.port2;
    port1.onmessage = function(event) {
        console.log("port1收到来自port2的数据：" + event.data);
    }
    port2.onmessage = function(event) {
        console.log("port2收到来自port1的数据：" + event.data);
    }

    port1.postMessage("发送给port2");
    port2.postMessage("发送给port1");


</script>
</body>
</html>